Who do you talk to to have a problem with the design of the F-150's?
Because of the new design of the bed on the F-150's, dust,sleet,rain,ect... gets into the the bed of the pick-up even with a topper or roll down cover.
Complain to Ford.
But who at Ford? That is my real question.
Ford is not going to give a darn. If it makes you feel better you can vent all over the web. I on the other hand would realize that truck beds are not meant to be weather tight and I would look for tailgate weather stripping and maybe a better bed topper.